The
above two principles | above two principles 1869 |
| two principles above given seem to me to 1859 1860 1861 |
| two principles above given, namely that variations do not generally supervene at a very early age, and that they are inherited at a corresponding age whatever that may have been, seem to me to 1866 |
| two principles. 1872 |
| facts. Fanciers select for breeding their dogs, horses, pigeons, &c., when nearly grown up: they are indifferent whether the desired qualities are acquired earlier or later in life, if the full-grown animal possesses them. 1869 |
| OMIT 1872 |
| facts in regard to the later embryonic stages of our domestic varieties. Fanciers select their horses, dogs, and pigeons, for breeding, when they are nearly grown up: they are indifferent whether the desired qualities and structures have been acquired earlier or later in life, if the full-grown animal possesses them. 1859 1860 1861 |
| several facts regarding the later developmental stages of our domestic varieties. 1866 |
| And the cases just given, more especially that of pigeons, show that the characteristic differences which give value to the breeds and which have been 1869 |
| And the cases just given, more especially that of pigeons, seem to show that the characteristic differences which give value to each breed, and which have been 1859 1860 1861 |
| Fanciers select their horses, dogs, and pigeons, for breeding, when they are nearly grown up: they are indifferent whether the desired qualities and structures have been 1866 |
| Fanciers select their dogs, horses, pigeons, &c., for breeding, when nearly grown up: they are indifferent whether the desired qualities are 1872 |
| accumulated by mans selection, have not generally appeared at a very early period of life, and have been inherited at a corresponding not early period. 1869 |
| accumulated by man's selection, have not generally first appeared at an early period of life, and have been inherited by the offspring at a corresponding not early period. 1859 1861 |
| accumulated by mans selection, have not generally first appeared at an early period of life, and have been inherited by the offspring at a corresponding not early period. 1860 |
| acquired earlier or later in life, if the full-grown animal possesses them. 1866 1872 |
| But 1859 1860 1861 1869 | | And 1866 1872 |
| case 1859 1860 1861 1869 | | cases 1866 1872 |
| of the short-faced tumbler, which when twelve hours old possessed its proper characters, proves that this is not the universal rule; for here 1869 |
| of the short-faced tumbler, which when twelve hours old had acquired its proper proportions, proves that this is not the universal rule; for here 1859 1860 1861 |
| just given, more especially that of pigeons, seem to show that 1866 |
| just given, more especially that of the pigeons, show that 1872 |
| must either have appeared at an earlier period than usual, or, if not so, the differences must 1859 1860 1861 1869 |
| which give value to each breed, and which 1866 |
| which 1872 |
| inherited, not at a corresponding, but 1869 |
| inherited, not at the corresponding, but 1859 1860 1861 |
| accumulated by man's selection, have not generally first appeared 1866 |
| accumulated by man's selection, and which give value to his breeds, do not generally appear 1872 |
| earlier age. 1859 1860 1861 1869 |
| early period of life, and have been inherited by the offspring at a corresponding not early period. 1866 |
| early period of life, and are inherited at a corresponding not early period. 1872 |
| 1 blocks not present in 1859 1860 1861 1869; present in 1866 1872 | | But the case of the short-faced tumbler, which when twelve hours old had acquired
its proper proportions,
proves that this is not the universal rule; for here the characteristic differences must either have appeared at an earlier period than usual, or, if not so, the differences must have been inherited, not at the
corresponding, but at an earlier age.
|
|
Now let us apply these
two principles | two principles 1869 1872 |
| facts and the above two principles— which latter, though not proved true, can be shown to be in some degree probable— 1859 1860 1861 |
| facts and the above two principles 1866 |
| group 1869 1872 | | genus 1859 1860 1861 1866 |
| OMIT 1869 1872 |
| on my theory 1859 1860 1861 1866 |
| ancient form and 1869 1872 |
| one parent-species, and of which the several new species have become 1859 1860 1861 1866 |
| for different 1869 1872 |
| in accordance with their diverse 1859 1860 1861 1866 |
| ..... 1869 1872 | | steps of 1859 1860 1861 1866 |
| variations 1869 1872 | | variation 1859 1860 1861 1866 |
| in the several species at a not early 1869 1872 |
| at a rather late 1859 1860 1861 1866 |
| will be left but little modified and will 1869 |
| of the new species of our supposed genus will manifestly tend to 1859 1860 1861 1866 |
| will have been but little modified, and they will still 1872 |
| adults,— 1869 1872 | | adults, 1859 1860 1861 1866 |
| with 1869 1872 | | in 1859 1860 1861 1866 |
| breeds 1869 1872 | | case 1859 1860 1861 1866 |
| the pigeon. 1869 1872 | | pigeons. 1859 1860 1861 1866 |
| widely distinct structures and to whole 1869 1872 |
| whole families or even 1859 1860 1861 1866 |
|
